I don't think an asteroid can destroy the whole planet but this could destroy all lifes on Earth and this could occur in the billions years left. But I think there are less chance that we die by an asteroid than by ourself.

Do you see how we use the resources of the Earth? I think we'll be destroyed by this much before an asteroid fall in the Earth.

Scientists are trying to detect these asteroids before they even reach the earth's orbit. If an asteroid approaches the earth, space organisations will send space crafts with nuclear warheads, towards the asteroid and it will destroy the asteroid._________________"I don't know what they will use in World War III. But in World War IV sticks and stones will be used." Albert Einstein

I don't think the earth, as a planet, could disappear. But, we are making our best effort to erase the life on it by uncaring the nature, by polluting everything: soil, water, air and by killing the different types of animals around all the continents.

I'd wish people could realize how rich and fair is our planet and would make one thing every day to save it, for example: Avoiding to expend more water than necessary when taking bath: avoiding to throw papers, acids and I don't know what else through the toilet. And the other unfair things we all use to do.

In the short term, we will destroy life on the Earth; this is already happening. It's a mass extinction, and scientists predict that within 100 years, half of all the species of creatures on this earth will be extinct because of us. However, even if 90% of the life on Earth is destroyed, in time it will grow back; it's happened before and it'll happen again.

In the long run, however, the Earth will be destroyed; the sun is a star, and all stars die eventually. The sun is predicted to turn into a red giant within a few hundred millions of years, and swallow up the Earth as well as Mars. That's the end of the world.

Norm_________________"They play in the devil's key
An endless symphony
I even hear it now
And I listen to the music
Beautiful music
Yes I listen to the music
Beautiful music"

I think the humankind will destroy itself in the long run, but the earth will survive and recover from the damages we have caused. There have been mass extinctions before, but somehow the fauna has been able to recur. We can't continue living like this, consuming all the time. At some point this has to stop. Weather it's the war over clean drinking water or someting else like that. The gap between the haves and the have nots is too big, so if you want to use your shower, don't wish that the poor people in Africa can have showers too. That's the rotten side of the world
there's never enough for everyone, coz we don't seem to be able to share things. The History will repeat itself _________________A madman is not less a musician than you or myself; only the instrument on which he plays is a little out of tune